1. Key Laboratory of Pollution Ecology and Environmental Engineering
2. Institute of Applied Ecology, Chinese Academy of Sciences
3. Shenyang 110016
4. China
5. University of Chinese Academy of Sciences
6. Faculty of Environmental Science & Engineering
7. Kunming University of Science & Technology
8. Kunming 650500
9. Stockbridge School of Agriculture University of Massachusetts
10. Amherst
11. USA